Here is the full list of all 34 Ashen achievements.
Hunt a squork.
Hunt a rafet.
Defeat the brute near Vagrant's Rest.
Wear the Umbral Veil.
Wear each relic once.
Defeat the Elder Dark Sissna.
Complete Flokir's journey.
Reunite the Listener and Human hearts.
Leap into the dark portal.
Unlock all townsfolk outfits.
Defeat the Shadow of the Ashen.
Complete Jokell's journey.
Complete Vorsa's journey.
Untangle Sissna's weave at the Palace of Lathyrus.
Complete Eila's journey.
Hunt a roamar.
Acquire all lanterns.
Construct all houses in Vagrant's Rest.
Unlock all crafting specialities.
Travel the shadow pathways.
Defeat Touma and Souma.
Meet Kol the wildman.
Take a ride in Eila's barrel.
Defeat the Listener Matriarch.
Free the Diasora pup.
Discover the secret of Contemplation.
Defeat the Elder Dark Ukkoto.
Hunt a Deer.
Hunt the corb near Vagrant's Rest.
Claim Vagrant's Rest.
Defeat Sissna in the Children of Sissna mode.
Defeat the Elder Dark Riak.
Defeat Riak in the Children of Sissna mode.
Acquire all Kol's armors.